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| 型号： | LP3907SQX-JIXI |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24 |
| 封装： | 4 X 4 MM, 0.8 MM HEIGHT, LLP-24 |
| 文件页数： | 44/44页 |
| 文件大小： | 3058K |
| 代理商： | LP3907SQX-JIXI |
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I/O Electrical Characteristics
Unless otherwise noted: Typical values and limits appearing in normal type apply for T
J = 25°C. Limits appearing in boldface
type
apply over the entire junction temperature range for operation, T
J = 0°C to +125°C. (Note 13)
Symbol
Parameter
Conditions
Limit
Units
Min
Max
V
IL
Input Low Level
0.4
V
IH
Input High Level
1.2
V
Power On Reset Threshold/Function (POR)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
nPOR
nPOR = Power on reset forBuck1 and
Buck2
Default
50
ms
nPOR
threshold
Percentage of Target voltage Buck1 or
Buck2
V
BUCK1 AND VBUCK2 rising
94
%
V
BUCK1 OR VBUCK2 falling
85
VOL
Output Level Low
Load = IoL = 500mA
0.23
0.5
V
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation
of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,
see the Electrical Characteristics.
Note 2:
All voltages are with respect to the potential at the GND pin.
Note 3:
Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
J = 160°C (typ.) and disengages at TJ
= 140°C (typ.)
Note 4:
The Human body model is a 100pF capacitor discharged through a 1.5k
resistor into each pin. (MILSTD - 883 3015.7)
Note 5:
In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be
derated. Maximum ambient temperature (T
A-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP = 125°C), the maximum power
dissipation of the device in the application (P
D-MAX), and the junction-to-ambient thermal resistance of the part/package in the application (θJA), as given by the
following equation: T
A-MAX = TJ-MAX-OP (θJA × PD-MAX). See Applications section.
Note 6:
Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists,
special care must be paid to thermal dissipation issues in board design.
Note 7:
Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.
Note 8:
C
IN, COUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
Note 9:
The device maintains a stable, regulated output voltage without a load.
Note 10:
Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100mV below its nominal value.
Note 11:
Quiescent current is defined here as the difference in current between the input voltage source and the load at V
OUT.
Note 12:
V
IN minimum for line regulation values is 1.8V.
Note 13:
This specification is guaranteed by design.
Note 14:
The I
Q can be defined as the standing current of the LP3907 when the I
2
C bus is active and all other power blocks have been disabled via the I2C
bus
, or it can be defined as the I2C bus active, and the other power blocks are active under no load condition. These two values can be used by the system
designer when the LP3907 is powered using a battery.
Note 15:
Pins 24, 19 can operate from V
IN min of 1.74 to a VIN max of 5.5V. This rating is only for the series pass PMOS power FET. It allows the system design
to use a lower voltage rating if the input voltage comes from a buck output.
Note 16:
The I
Q exhibits a higher current draw when the EN pin is de-asserted because the I
2
2 buffer pins draw an additional 2A.
Note 17:
VPOR is voltage at which the EPROM resets. This is different from the UVLO on VINLDO12, which is the voltage at which the regulators shut off; and
is also different from the nPOR function, which signals if the regulators are in a specified range.
Note 18:
Buck V
IN ≥ VOUT + 1V.
9
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LP3907
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP3907SQX-JXQX | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface |
| LP3907SQX-JXQX/NOPB | 功能描述:其他电源管理 RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| LP3907SQX-PFX6W/NOPB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP3907SQX-PJXIX/NOPB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP3907SQX-PXPP | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface |
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